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Finding the Fourth Proportional to 121,331.60, 182,191.80 and 91,782.80

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Solution

The fourth proportional to 121,331.60, 182,191.80 and 91,782.80 is: 137,821.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,331.60 : 182,191.80 = 91,782.80 : x
  2. Step 2: Convert to fraction form
    121,331.60/182,191.80 = 91,782.80/x
  3. Step 3: Cross multiply
    121,331.60x = 182,191.80 × 91,782.80
  4. Step 4: Simplify right side
    121,331.60x = 16,722,073,541.04
  5. Step 5: Solve for x
    x = 16,722,073,541.04/121,331.60
  6. Step 6: Final answer
    x = 137,821.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.